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D0:10.13374f.issn1001-053x.2011.s1.030 第33卷增刊1 北京科技大学学报 Vol.33 Suppl.1 2011年12月 Journal of University of Science and Technology Beijing Dec.2011 LF精炼对CSP集装箱钢T[O]和夹杂物影响 朱万军12)区铁12)李光强)沈继胜)王春锋) 1)武汉科技大学钢铁治金及资源利用省部共建教育部重点实验室,武汉4300812)武汉钢铁(集团)公司研究院,武汉430080 3)武汉钢铁(集团)股份公司条材总厂薄板坯连铸连轧分厂,武汉430080 4通信作者,E-mail:hzw80@163.com 摘要为提高武钢薄板坯连铸连轧产线集装箱钢水洁净度,通过工业试验考察了LF精炼过程炉渣成分、软吹氩以及钙处 理工艺对钢中T[0]和夹杂物的影响.试验结果表明,适当提高(C0+MgO)/SiO2有利于降低钢中T[0],但同时要考虑 (Ca0+MgO)IA,0,的比值,适当增加钙处理前后软吹氩时间可明显提高钢水洁净度:将炉渣中(Ca0+MgO)/SiO2和(Ca0+ MgO)/A山,03控制在合适范围不仅有利于提高钢水洁净度,而且有利于钢中低熔点CO-MgO一Al,03系夹杂物的生成.根据 相关热力学数据给出了实际生产钢中生成不同液态铝酸钙时[C]一[A]平衡热力学计算模型 关键词炼钢:精炼;夹杂物:炉渣;钙处理 分类号T℉769.2 Effect of LF refining on T O]and inclusions of container steel in compact strip production process ZHU Wanjun,OU Tie,LI Guang-qiang,SHEN Ji-sheng,WANG Chun-feng 1)Key Laboratory for Ferrous Metallurgy and Resources Utilization Ministry of Education).Wuhan University of Science and Technology.Wuhan 430081,China 2)Research and Development Center,Wuhan Iron and Steel Group)Corporation.Wuhan 430080.China 3)Compact Strip Production Plant,Structural and Bar Integrated Mill,Wuhan Iron and Steel Group)Corporation.Wuhan 430080,China ☒Corresponding author,E-mail:hz时j80@l63.com ABSTRACT In order to improve the cleanliness of container steel for the compact strip production(CSP)production line of Wuhan Iron and Steel Corporation,the effect of slag compositions,argon blowing and calcium treatment on T[O]and inclusions was studied by industrial trials.The results show that increasing the ratio of (Cao+Mgo)/Si0,is beneficial to decreasing T[O]in molten steel., but the ratio of CaO Mgo)/Al,O,should be considered.The increase of argon blowing time before and after calcium treatment can improve the cleanliness of molten steel obviously.The suitable ratios of Ca0+Mgo)/Si0,and CaO+Mgo)/AL O,in the slag are not only beneficial to improving the cleanliness of molten steel but also forming the low melting temperature inclusions of CaO-Mgo- Al2O;type.Based on thermodynamic data,a thermodynamic calculation model for the equilibrium of [Ca]and [Al]was given when liquid calcium-aluminate formed in actual production. KEY WORDS steelmaking:refining:inclusions:slag:calcium treatment 集装箱钢板对耐蚀性、韧性、焊接性、板形和表此,CSP工艺对钢水洁净度要求高于常规生产线,特 面质量要求很高,因此生产难度大,特别是薄规格板别是生产薄规格集装箱钢板时,对钢水洁净度以及 (≤2.0mm)更是如此.CSP工艺生产薄规格集夹杂物尺寸要求更严格.武钢CSP生产线在生产薄 装箱钢板具有独特的优势,但表面质量控制是一 规格集装箱钢板时,也存在因夹杂造成的表面缺陷 难点。由于薄板连铸坯比表面积高于常规铸坯, 问题和钢水连浇性差的问题.因此,为提高钢水洁 夹杂物更易在铸坯皮下集中,影响产品表面质量,因 净度,改善武钢CSP生产线集装箱钢板表面质量问 收稿日期:20110808第 33 卷 增刊 1 2011 年 12 月 北京科技大学学报 Journal of University of Science and Technology Beijing Vol. 33 Suppl. 1 Dec. 2011 LF 精炼对 CSP 集装箱钢 T[O]和夹杂物影响 朱万军1,2) 区 铁1,2) 李光强1) 沈继胜3) 王春锋3) 1) 武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,武汉 430081 2) 武汉钢铁( 集团) 公司研究院,武汉 430080 3) 武汉钢铁( 集团) 股份公司条材总厂薄板坯连铸连轧分厂,武汉 430080 通信作者,E-mail: hzwj-80@ 163. com 摘 要 为提高武钢薄板坯连铸连轧产线集装箱钢水洁净度,通过工业试验考察了 LF 精炼过程炉渣成分、软吹氩以及钙处 理工艺对钢中 T[O]和夹杂物的影响. 试验结果表明,适当提高( CaO + MgO) /SiO2 有利于降低钢中 T[O],但同时要考虑 ( CaO + MgO) /Al2O3 的比值,适当增加钙处理前后软吹氩时间可明显提高钢水洁净度; 将炉渣中( CaO + MgO) /SiO2 和( CaO + MgO) /Al2O3 控制在合适范围不仅有利于提高钢水洁净度,而且有利于钢中低熔点 CaO--MgO--Al2O3 系夹杂物的生成. 根据 相关热力学数据给出了实际生产钢中生成不同液态铝酸钙时[Ca]--[Al]平衡热力学计算模型. 关键词 炼钢; 精炼; 夹杂物; 炉渣; 钙处理 分类号 TF769. 2 Effect of LF refining on T[O]and inclusions of container steel in compact strip production process ZHU Wan-jun1,2) ,OU Tie 1,2) ,LI Guang-qiang1) ,SHEN Ji-sheng3) ,WANG Chun-feng3) 1) Key Laboratory for Ferrous Metallurgy and Resources Utilization ( Ministry of Education) ,Wuhan University of Science and Technology,Wuhan 430081,China 2) Research and Development Center,Wuhan Iron and Steel ( Group) Corporation,Wuhan 430080,China 3) Compact Strip Production Plant,Structural and Bar Integrated Mill,Wuhan Iron and Steel ( Group) Corporation,Wuhan 430080,China Corresponding author,E-mail: hzwj-80@ 163. com ABSTRACT In order to improve the cleanliness of container steel for the compact strip production ( CSP) production line of Wuhan Iron and Steel Corporation,the effect of slag compositions,argon blowing and calcium treatment on T[O]and inclusions was studied by industrial trials. The results show that increasing the ratio of ( CaO + MgO) /SiO2 is beneficial to decreasing T[O]in molten steel. , but the ratio of ( CaO + MgO) /Al2O3 should be considered. The increase of argon blowing time before and after calcium treatment can improve the cleanliness of molten steel obviously. The suitable ratios of ( CaO + MgO) /SiO2 and ( CaO + MgO) /Al2O3 in the slag are not only beneficial to improving the cleanliness of molten steel but also forming the low melting temperature inclusions of CaO-MgO￾Al2O3 type. Based on thermodynamic data,a thermodynamic calculation model for the equilibrium of [Ca]and [Al]was given when liquid calcium-aluminate formed in actual production. KEY WORDS steelmaking; refining; inclusions; slag; calcium treatment 收稿日期: 2011--08--08 集装箱钢板对耐蚀性、韧性、焊接性、板形和表 面质量要求很高,因此生产难度大,特别是薄规格板 ( ≤2. 0 mm) 更是如此[1]. CSP 工艺生产薄规格集 装箱钢板具有独特的优势[2],但表面质量控制是一 难点. 由于薄板连铸坯比表面积高于常规铸坯[2], 夹杂物更易在铸坯皮下集中,影响产品表面质量,因 此,CSP 工艺对钢水洁净度要求高于常规生产线,特 别是生产薄规格集装箱钢板时,对钢水洁净度以及 夹杂物尺寸要求更严格. 武钢 CSP 生产线在生产薄 规格集装箱钢板时,也存在因夹杂造成的表面缺陷 问题和钢水连浇性差的问题. 因此,为提高钢水洁 净度,改善武钢 CSP 生产线集装箱钢板表面质量问 DOI:10.13374/j.issn1001-053x.2011.s1.030
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